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(11) | EP 2 053 723 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Electric motor |
(57) An electric motor 10 has a wound rotor 14 having a shaft 16, a rotor core 15, a commutator
19 and windings wound about the rotor core 15 and connected to the commutator 19.
It has a stator 12 confronting the rotor 14; brush gear 20 electrically connecting
the commutator 19 to motor terminals 23; first and second bearings 18, 28 for rotatably
supporting the rotor 14, and an oil collector 35 fitted to the shaft 16 between the
commutator 19 and the first bearing 18 for preventing oil migrating along the shaft
16 from the first bearing 18 reaching the commutator 19. The oil collector 35 is of
high temperature material, preferably a metal such as brass, aluminum and steel. In
a preferred embodiment, the oil collector 35 returns collected oil to the first bearing
18.
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